Hello,
First of all, thank you for your purchase.
To remove the ‘Uncategorized’ category from newly created posts, please go to importing rule settings of the plugin, found in the ‘Top News to Posts’ or ‘Custom News to Posts’ plugin menu, depending on where you created your rules -> click ‘Settings’ for the rule you created -> check the ‘Remove WP Default Post Category‘ checkbox -> save settings.
Please note that this needs to be applied to all importing rules you created in the plugin and the change will apply only to posts which will be created after you make this settings change in the plugin.
Let me know if this helped.
Regards, Szabi – CodeRevolution.